You know what to do in version 2 of the track download API, right ? ;)
Yann
Le 19 mars 09 à 11:20, Andy Robinson (blackadder-lists) a écrit :
That’s correct; the database only holds the location for each
trackpoint and
not any other data. You need to download the original tracklogs for
Yann Coupin wrote:
You know what to do in version 2 of the track download API, right ? ;)
Well only if we want to reparse several hundred thousand tracks, and
provide storage space for hundreds of millions of hdop values in the
database and we believe that the benefit from doing do (which is
Tom Hughes wrote:
Yann Coupin wrote:
You know what to do in version 2 of the track download API, right ? ;)
Well only if we want to reparse several hundred thousand tracks, and
provide storage space for hundreds of millions of hdop values in the
database and we believe that the
Andy Deakin wrote:
If the hdop values run between 0-50, in mysql you would only need a
tinyint (1 Byte) so to store this for all 727425591 trackpoints would
take up less than a GB. I don't think it is worth reparsing all the
files, but just because something is not done in the past does
From my experience with my Garmin unit (which, ironically enough, does not save
error values with the track logs, but does show an error circle on screen), the
GPS error does give a reasonable indication of when the current position is
likely to be inaccurate (for example when inside a building).
Mine, at least, doesn't produce directly gpx, but just logs nmea
sentences. GPSbabel correctly outputs the hdop, vdop and pdop in GPX
files during the conversion. I have no idea of how exceptional
compared to already uploaded tracks that is though...
Yann
Le 20 mars 09 à 16:25, Ed Avis a
As an aside, while I was using some traces I made and I wanted to
compare them to existing one, I realized that downloding points using
the API doesn't return the hdop that was available in the original
file, this is really a shame as it's an important info to judge the
quality of
Yann Coupin wrote:
Sent: 19 March 2009 8:22 AM
To: talk@openstreetmap.org
Subject: Re: [OSM-talk] GPS track precision (was GPS track upload
working?)
As an aside, while I was using some traces I made and I wanted to
compare them to existing one, I realized that downloding points using
the API
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